Michael H. Williamson
Tennessee State University
85 Papers
938 Citations
Michael H. Williamson is an academic researcher from Tennessee State University. The author has contributed to research in topics: Exoplanet & Radial velocity. The author has an hindex of 26, co-authored 84 publications.
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Papers
A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
David K. Sing,Jonathan J. Fortney,Nikolay Nikolov,Hannah R. Wakeford,Tiffany Kataria,Thomas M. Evans,Suzanne Aigrain,Gilda E. Ballester,Adam Burrows,Drake Deming,Jean-Michel Desert,Neale P. Gibson,Gregory W. Henry,Catherine M. Huitson,Heather Knutson,Alain Lecavelier des Etangs,Frederic Pont,Adam P. Showman,Alfred Vidal-Madjar,Michael H. Williamson,Paul Wilson +20 more
TL;DR: The difference between the planetary radius measured at optical and infrared wavelengths is an effective metric for distinguishing different atmosphere types, so that strong water absorption lines are seen in clear-atmosphere planets and the weakest features are associated with clouds and hazes.
A PRECISE WATER ABUNDANCE MEASUREMENT FOR THE HOT JUPITER WASP-43b
Laura Kreidberg,Jacob L. Bean,Jean-Michel Desert,Michael R. Line,Jonathan J. Fortney,Nikku Madhusudhan,Kevin B. Stevenson,Adam P. Showman,David Charbonneau,Peter R. McCullough,Sara Seager,Adam Burrows,Gregory W. Henry,Michael H. Williamson,Tiffany Kataria,Derek Homeier +15 more
TL;DR: In this paper, the water abundance in the atmosphere of the 2 MJup short-period exoplanet WASP-43b was determined based on thermal emission and transmission spectroscopy measurements obtained with the Hubble Space Telescope.
A Detection of Water in the Transmission Spectrum of the Hot Jupiter WASP-12b and Implications for its Atmospheric Composition
Laura Kreidberg,Michael R. Line,Jacob L. Bean,Kevin B. Stevenson,Jean-Michel Desert,Nikku Madhusudhan,Jonathan J. Fortney,Joanna K. Barstow,Gregory W. Henry,Michael H. Williamson,Adam P. Showman +10 more
TL;DR: In this article, a near-infrared transmission spectrum for WASP-12b based on six transit observations with the Hubble Space Telescope/Wide Field Camera 3 (HST-WFC) was reported.
Helium in the eroding atmosphere of an exoplanet
Jessica Spake,David K. Sing,David K. Sing,Thomas M. Evans,Antonija Oklopčić,Vincent Bourrier,Laura Kreidberg,Benjamin V. Rackham,Jonathan Irwin,David Ehrenreich,Aurélien Wyttenbach,Hannah R. Wakeford,Yifan Zhou,Katy L. Chubb,Nikolay Nikolov,Jayesh M. Goyal,Gregory W. Henry,Michael H. Williamson,Sarah D. Blumenthal,David R. Anderson,Coel Hellier,David Charbonneau,Stéphane Udry,Nikku Madhusudhan +23 more
TL;DR: A detection of helium absorption at 10,833 Å on the exoplanet WASP-107b reveals that its atmosphere is extended and eroding, and demonstrates a new way to study upper exoplanetary atmospheres.
Global Climate and Atmospheric Composition of the Ultra-hot Jupiter WASP-103b from HST and Spitzer Phase Curve Observations
Laura Kreidberg,Michael R. Line,Vivien Parmentier,Kevin B. Stevenson,Tom Louden,Mickael Bonnefoy,Mickael Bonnefoy,Jacqueline K. Faherty,Gregory W. Henry,Michael H. Williamson,Keivan G. Stassun,Thomas G. Beatty,Jacob L. Bean,Jonathan J. Fortney,Adam P. Showman,Jean-Michel Desert,Jacob Arcangeli +16 more
TL;DR: In this article, the authors presented thermal phase curve measurements for the hot Jupiter WASP-103b observed with the Hubble/WFC3 and Spitzer/IRAC spectra.